Question

How do transposable elements and short tandem repeats (STRs) differ? a. STRs occur within exons; transposable elements occur within introns. b. STRs occur within introns; transposable elements occur within exons. c. STRs make up only a small percentage of a given genome while transposable elements often make up larger parts of a given genome. d. The repeated unit in STRs is much larger than the repeated unit of transposable elements.

Answer 1

Transposable elements and short tandem repeats are different because short tandem repeats make up only a small percentage of a given genome while transposable elements often make up larger parts of a genome. So the correct option is C.

What are transposable elements?

Transposable elements or transposons are a class of genetic elements. They can  “jump” from one location to another, in a genome.

Even though they are called “jumping genes,” they have an integrated site in a genome and are maintained there. Also, most of them are eventually inactivated and can not move any longer.

Whereas Short tandem repeats or STRs are short repeats of DNA. They are also known as microsatellites or simple sequence repeats. They have a repetitive unit of 1-6 bp and form a series of 100 nucleotide lengths.

Therefore the correct option C.

Read more about transposons, here

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